Big Horn 19394 Double Sided Diamond Stone 400/1000 Grit Stone Color: Silver | Sharpening Stone: Diamond Sand Base Holder: Chrome-Plated Iron + Silicone Holder Size (approx.): 290 (11.4") x 70 (2.7") mm Stone Size (approx.): 200 (7.8") x 70 (2.75") x 8(0.3") mm ( L x W x H) Base Adjustment: Maximum adjustable: 220mm (8.7inch), Minimum adjustable: 80mm (3.1inch)